Where is OS X headed?

So I've been using mountain lion for while, and obviously, iOS is really starting to flood into OS X. I've just been wondering though, is OS X just going to one day become a glorified iOS device with a mouse and keyboard? Or are we going to see iPad and OS X converge into one? When Apple says post PC, do they mean no more mouse and keyboard?

Windows 8 is going full force into converging the tablet and computer. Apple is moving incrementally and its a bit challenging to see where their going with this. So what do you guys think?